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Mama L [17]
3 years ago
11

Please help, thanks!

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
4 0

Answer:

(1+2x) + (29+x) =180°

=1+2x+29+x=180°

3x+30=180°

3x=180-30

x= 150/3

x=50

the value of x is 50

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KIM [24]

Answer:

It A or the first one

Step-by-step explanation:

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A total of $7000 is invested: part at 8% and the remainder at 12%. How much is invested at each rate if the annual interest is $
Ivahew [28]

We invested $7000 invested in two accounts, we don't know how much exactly is in each account, therefore we will assign variables to these amounts. The amount invested in the "8%" account is "x", while the other one is "y". The sum of these two numbers must be equal to $7000, therefore:

x+y=7000

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We need to solve the system in order to determine the values.

\begin{gathered} \begin{cases}x+y=7000 \\ 0.08x+0.12y=580\end{cases} \\ \begin{cases}-0.12x-0.12y=-840 \\ 0.08x+0.12y=580\end{cases} \\ -0.04x=-260 \\ x=\frac{-260}{-0.04}=6500 \\  \end{gathered}

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\begin{gathered} 6500+y=7000 \\ y=7000-6500 \\ y=500 \end{gathered}

The values are 6500 in the 8% account and 500 in the 12% account.

4 0
1 year ago
Please answer question 4
dangina [55]

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6 0
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DENIUS [597]

Answer:

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In the graph, there is a cycle of increasing and decreasing. First, the original circle increases by 25% into the new, larger circle. Then, the circle does back to its original size. So, to solve we can assign a value to the smaller circle, increase it by 25%, and then find what percentage brings this back to the original value.

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